Ore-grinder.



wilma-am' E. F. MCCGOL.

ORE GRINDER.

APPLICATION FILED SEPI. I3, I9II. RENEWED Nov. I6, I9I4.

Patented June 22, 1915.'

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'3 SHEETS-SHEET F.. F. MccooL.

ORE GRINDER.

` APPLICATION FILED SEPT. I3, ISH. RENEWED NOV-16,19I4.

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Specinca'tion of Letters Patent.

Patented J une 22, i915.

application filed September 13, 1911, Serial No. 649,209. Renewed November 16,1914. Serial No. 872,501.

To all 'wlw/2t 'it muy concern Be itknown that l, EDWARD F. McCooL, a citizen of the United States, residing at i'victor, countyof Teller and State of Colorado, have invented certain new and useful improvements inOre-Grinders; and I do declare the following to be a full, clear, and exact description of the invention, such as will. enable others skilled in the art to which it a-ppertains to make and use the same, reference beinghad to` the accompanying drawings, and tp ,the characters of reference marked thereon, which form apart of this specication. 'Y

lllly'invention relates to improvements in ore grinders ,being more especially adapted.

for' use in grinding ore for samples, special, provision being made whereby it becomes practicable tof'thoroughly clean the grinding disks or members, whereby the quality of the ore ground at one operation will not, in any way, affect the quality of the next charge, and to this end special attention has been given to the construction, whereby the grinding or pulverizing members may be thoroughly cleaned after each operation.

ln my improved construction, the grinding function is performed by two disks, to whichthe ore to be ground is fed through a hopper, carried by one of the disks, the lastnameddisk being comparatively stationary, but being mounted .to permit, to a limited extent, a rocking action to compensate for any unevenness that may exist between the two disks for any reason.

in my improved construction, l `mount an operating shaft eccentrically within another shaft, which will hereinafter be referred t ,as a hollow shaft or sleeve. To one extremity of the operating shaft is secured a head grooved to receive the tongue of a rotary disk, which coperates with the first-V niuned disk, or relatively stationary member, to perform the grinding function.

Power is transmitted initially to the hollow shaft upon which a fast pulley is mounted for the purpose. lThis hollow shaft carries a crank arm upon the outer extremity of which is mounted a pinion or relatively small gear, which meshes with a larger gear fast gsi the operating sha'ft, whereby ro tary motion is transmitted to the operating shaft upon its own axis, and at a faster vspeed than the rotation of the hollow shaft, the operating shaft being carried around in an orbit, so to speak, with the hollow shaft,

block, the latter in turn bearing on the ad-.

jacent extremity of the operating shaft'. Provision is further made for swingingdhe grinding head, upon which the :relatively stationary grinding member ist mounted.'

a 'ay from the rotary grinding member, thus giving ample oppr'grtrutit'yI jfor thoroughly cleaning the grindingffaces of both members, after the treatmentof each.,

charge of ore. v

Having briefly outlined my improved construction, I will proceed to .describe the same in detail, reference being made to the accompanying drawing, in which is illus. -trated ,an embodiment .thereof In this drawing: Figure l is a vertical longitudinal section, taken through my improved ore grinder. This may bel termed a sectioiftaken on the line l*1 of Fig. 2. Fig. 2 is a lvertical cross section,-taken on the line 2-2 of Fig. l, looking toward the right. Fig. 3 is a side elevation of the grinding head of the machine, the balance of the structure being broken away. Fig. 4 is a ,view ofthe same construction as Fig. 3, the grinding head, however, being shown in two positions, the dotted line position being that which it normally occupies during the operation of the machine, and the full line position that which it occupies when swung away from the rotary grinding member. F ig. 5 is an end elevation of the grinding head of the machine, being a view looking in the direction'of arrow 5, Fig. 6. Fig. 6 isa vertical section, taken on the line 6 6, Fig. 5.

The same reference characters indicate the same parts in all the views. i A

Let the numeral 5 designate a suitable framework inwhich is journaled a hollow shaft 6, within which is eccentrically mounted an operating shaft 7, whose forward extremity is fixedly connected with a block 8 to cause the said lock to rotate with the shaft, the block having a dovetail groove 9 adapted to receive a tongue 10 of counterfeo part shape, formed on the rotary grinding member 12, the. grinding member being locked on the said block-by means of setr bolts 13` The grinding member 12 protrudes into a hollow grinding head '14, in-l cluding a grinding member 15, mounted on a plate 16, carrying a hopper 17, whose opening 18 registers with an opening 19 eX- tending through the grinding member 15. The grinding head is equipped with a forwardly' located yoke 20, 4which extends horizontally iii front of the head plate 16, and is provided with arms 21 extending parallel with each other, their rear extremities being formed integral with a housingr 22, forming a partof the grinding head. This Ayoke is centrally recessed, as shown at' 23, and in this opening is Aslidably mounted a'nut 24, through which is threaded an adjusting screw 25, whose inner extremity is ballshaped, as shown at 26, and engages a socket 27 of similar shape, formed in the head plate 16 and a reinforcing member 28, centrally connected with the head .plate by bolts 29. This reinforcing member is covered by a housing 30, through which the shank of the screw 25 passes. By virtue of this construction, the head plate 16, together with the'grinding members 15 mounted thereon, is longitudinally movable with the nut 24 and the latteris caused to travel back and forth in the direction lengthwise of the machine by turningthe screw 25 in the nut 24.

lA spiral spring 31 is interposed between the` housing and the inner extremity of the nut '24. This grinding head is hinged to the main framework of the machine, as shown at 32, but is normally locked in the position to operate, as shown by dotted linesin Fig. 4, b v a. bell-crank lever 33, pivoted at 34 on Ythe housing member 22, one arm 35 of the bell-crank' lever being formed into a hook 36 to engage the stationary 'framework of the machine. The opposite extremity '37 of the bell-cranklever is connected by means.

of a rod 38 with a wrist-pin 39, formed 'on the hand lever 40, a short distance above the fulcrum or the lower extremity of the latter. The lower end of this lever 40 is made fast to a rock shaft 41, journaled in relatively stationaryarms 42, secured to the yoke 20 and extending downwardly and slightly rearwardly therefrom. Fast on this rock shaft are two crank arms 43, whose upper -extremities are equipped with a pin 44, engaging a recess formed in a depending part 46 of the nut 24. By moving the hand lever 40 forwardly, the hooked arm i' ofthe bell-crank lever 33, is disengaged from the forward portion of the stationary frame simultaneously with the forward movement of the nut 24 in the yoke, this forward movement of the nut serving, through the instrumentality of the screw 25, to impart a corresponding movement to the head plate grinding member 15.

16, together with the hopper 18 and the As soon as the bell'- crank lever hasbeen thrown to the disengaged position, illustrated in full lines in Fig. 4, a further -pull upon the hand lever 40 can only result in swinging the grinding head upon its hinge 32 whereby the said head is causedto occupy the position shown by full lines in Fig. '4, thus leaving the face of the rotary grinding member 12 'exposed for cleaning purposes. Attention is called to the fact that, as the head plate and grinding member 15 are thrown for# wardly by initial action of the hand lever 40, they are caused to occupy ,the position shown in Fig. 6, whereby the 4head plate is lThese bearings are-eqi'iipped with openings 53 for the introduction of lubricating matcrial.

ing head may be thoroughly cleaned, after The hollow shaft is also'providedd se' Y,

with perforations 54 and 55, through which the oil or other lubricant passes througl'iv the shell. of the hollow shaft to the eccentrically-mounted operating shaft 7. An interiorly-cogged ring 56 is mounted on the framework, being secured in place by bolts 57, which pass through a flange 58 of the framework, the ring 56,"and a housing 59, the housing being further connected with a sleeve 60` by means of bolts 61 passed through lugs 62 formed on the sleeve and ics threaded into the housing 59. Within the sleeve 60 is movablyloated a plug or block 63, whose forward extremity bears against the adjacent extremity of the operatin shaft 7. The rear extremity of this block isf' engaged by a feed screw 64, which is thread-4 ed in the outer extremity 65 of the sleeve:

As the feed screw isrotated in the proper direction, it acts upon the block 63 "to move the operating shaft longitudinally and canse the rotary grinding member 12-to approach the relatively stationary .inding member 15. The rear extremity o the hollow shaft 6 is equipped with a crank arm 66, carrying at its outer extremity a relatively small gear or pinion 67, which meshes with the in terior cogs of the ring 56. This pinion-also meshes with a larger gear 68, splined on the rear extremity vof the operating shaft 7, as shown at69. .By virtue of this c onstruction, it will be understood that power' is transmitted to the hollow shaftfr'o'ni a line shaft or motor, which is connected with ist the fast pulley A47, and rotary motionv willv be' transmitted to the operating shaft?, eccentrically mounted within the hollow shaft, as heretofore explained, the rotary speed of the two shafts varying. The rotaryv motion of the.operating shaft on its own axis is also transmittedV to the grinding memg ber l2, as wellas the movement resulting eccentric mounting of the latter within the` hollow shaft. v

During the operation of the machine, ore is fed into the 'hopper 18 and reaches the adjacent grinding or pulverizing faces of the coperating grinding members 9 and 15,

.the said members being slightly, centrally recessed forming a sort of pocket permit the entrance of the ore to beground. This ground ore passes downwardly and is caught in a sort of drawer or sliding receptacle 70, which is large enough to contain the charge of ore, or the sample which has been ground by the machine. Having removed the sliding receptacle from the grinding head, the latter is then swung outwardly to the full line position in Fig. 4; for purposes of thoroughly cleaning the grinding members and other adjacent parts of the head and the machine preparatory to the use of the latter in preparing another sample. When the grinding head is locked to the framework of the machine by the hook-shaped bell-crank lever 33, the parts are locked in the said position by means of adog 71pivoted on the lever 40, as shown at 72, the operating extremity of the dog engaging a lug 73 fast on the yoke 20. rlhis dog is connected by means of a. rod 7 i with a handle 75 pivoted on the lever, as shown at 7G. lVhen'the grinding head is returned to the lcking position, the dog will engage the lug 73, and, by virtue of its spring 7l, the dog will normally remain in the locking position. yThis locking mechanism is necessary in order to permit the adjustment ,of the grinding member l5 through the agency of the screw 25 since otherwise when turnin the screw, in order to cause the grinding member l5 to approach the grinding member 12, the uut Q4 might traveloutwardly on the screw, This it cannot do, when the locking dog 7l is employed, since this dog locks the hand lever against movement, and the nut cannot move independently of the movenient of the lever. i

Having thus described my invention, what l claim is:

l. Anore grinder, comprising va suitable meneer frame, an operating shaft, a grinding disk mounted to rotate with said shaft, a coperating non-rotary grinding member, a hous- 'ing surrounding the` grinding member, a

away from yits coperating member, and.

means-for moving the nut within the yoke to impart longitudinal movement to the non-rotary grinding member, substantially as described.

2. ln an ore grinder, the combination with a suitable frame, of a housing hinged to the frame, a yoke connected with the housing, a nut slidable vin the yoke, a nonrotary grinding member inclosed by the said housing, a suitable connection'between the non-rotary member and the nut, a rock shaft, a connection between the rock shaft and the nut for sliding the latter as the shaft is actuated, a hand lever connected with the rock shaft, a bell-crank lever, mounted on the housing remote from the hinge and having one of its arms hookshaped to engage the adjacent member of the frame when the housing is in the normal position, and an operative eonneetionbetween the bcll-crank lever and the hand lever, whereby as the latter is actuated,the bellcrank lever is disengaged from the frame, and the non-rotary grinding member moved longitudinally by virtue of its connection with the slidable nut, the hand lever also serving to swing the housing and its connections on the housing hinge.

3. In an ore grinder, a sleeve, a shaft eccentrically mounted within said sleeve,

means for rotating said sleeve and shaft at different speeds, a grinding disk supported upon said shaft and a non-rotatable grinding disk mounted to permit of a slight rocking movement and arranged to bear against the grinding face of said first disk.

4. In an ore grinder, asleeve, a sha-ft eccentrically mounted therein, means for rotating said sleeve and shaft, a grinding disk supported on said shaft and a non-rotatable grinding disk mounted to permit of a slight rocking movement and arranged to bear against the grinding face of said first disk.

5. In an ore grinder, a sleeve, a shaft eccentrically mounted therein, means for rotating said sleeve, a grinding disk supported upon said shaft and a nonrotatable grinding disk mounted to permit of a slight rocking movement and arranged to bear against the grinding face of said first disk. 6. In an ore grinder, a suitable frame, a sleeve, a shaft eccentrically mounted therein, means for rotating said sleeve and shaft,

a grinding disk supported upon one end of' said shaft, and means for adjusting said shaft longitudinally, independent of said sleevesubstantially as described.

In an ore grinder, a frame, a hollow grinding head hinged upon said frame, a fastening opposite the hinge, a non-rotary grinding member within said grinding head,

a nut slidable in said grinding head and supporting said non-rotary grinding member, and means for actuating said nut and fastening simultaneously.

8. In an oregrinder,V a frame, a hollow grinding'. head hinged upon said frame, a fastenin Voppositethe hinge, -a yoke exterior of tie said grinding head, a non-rotary grinding member within the said grinding head, a nut slidable in said yoke and supporting said non-rotary grinding member,V

and means for actuating said nut and fas- I tenin simultaneously.

. astening opposite the hinge,

9. n al1-nre nrifnder, a frame', ahollow rinding head grinding member Within the' said grinding head, anutslidable in said grinding head and supporting said -non-rotaryl grinding member, and a lever for actuating said nut andffastening simultaneously. A 10. In 'an ore grinder, a frame, a sleeve, a

shaft eccentrica y mounted therein, means for rotating said sleeve-and shaft, a rinding disk supported upon one end o said shaft, an. adjustabley abutment at the oppoopposite end of inged upon said frame, a

a non-rotary site end of lsaid shaft,l a grindingdisk arranged to bearagainstthe grinding face of said first disk and means for adjusting said v ing disk arranged to bear against the grinding face of said first-disk, and means for adjusting said last named grinding disk toward and away'from the first named disk.

12, In an ore grinder, a frame, ai sleeve, a

shaft eccentrieally mounted' therein, means for Vrotating said sleeve, an operative connection between said sleeve and shaft tu transmit rotation to said shaft, disk supported upon one end of said shaft, an adjustable abutment at the opposite end of said shaft, a grinding disk arranged to bear against the disk andl means or adjusting the said last named grinding disk toward and away fromthe first named disk 4 In testimony whereof I aiix my signature,

in presence of two witnesses.

3 EDWARD F. MCCOOL. Witnesses: 1 7

CLARA E. BRADEN, F. E; BoWnN.

a grinding inding face of said .firstv 

